Distance to go:
Ben and Tarka will cover 1800 miles starting from Scott's Terra Nova Hut at the edge of Antarctica to the South Pole and back to the coast again. That's equivalent to 69 back-to-back marathons hauling up to 200kg each (the weight of roughly two adult men) of kit and supplies necessary to survive.
Distances here are shown in statute miles.
Crevasse Rescue Training in Greenland (Video)
Crevasse rescue is one of those things that you need to know like the back of your hand if you travel on glaciers, but hope that you'll never need to use for real.
Check out this short video showing Ben and Tarka honing their skills in Greenland earlier this month.